Lightroom Classic: HDR Panorama ignores stacks

  • 1
  • Problem
  • Updated 2 months ago
  • Not a Problem
  • (Edited)
Here's the thing:

  1. You take HDR images in order to create a panorama
  2. You auto stack each HDR sequence using auto stack
  3. You want to create an HDR Panorama by selecting the stacks
--> this doesn't work, LR seems to be only taking the top images of each stack in order to generate it's panorama, which doesn't make any sens. LR should understand each stack contains the HDR images.
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Antoine Hlmn

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Posted 3 months ago

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Jerry Syder

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I totally agree - there has been a lot of noise about this so hopefully it will be taken into consideration in a future release. 
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Carlos Cardona

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There was another thread about this, Adobe Champion said that's the way it's supposed to work (in other words, there'll be no changing it)! You have to expand each stack and select all the shots individually, but you have a right to grumble!
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David Golding

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John R. Ellis, Champion

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Starting with 8.4, LR assumes that each stack constitutes a separate HDR, Panorama, or HDR Panorama.  When you select multiple stacks and do Merge, that initiates a batch operation, queueing up the stacks, each to be merged separately into its own image:
https://blogs.adobe.com/jkost/2019/08/lightroom-classic-8-4-gpu-accelerated-image-editing-export-to-png-batch-photo-merge-stacked-images-and-more.html 

So use a slightly different work flow:

1. Select all photos and do Photo > Stacking > Auto-Stack By Capture Time.

2. Select all the stacks for a single panorama and do Photo > Stacking > Group Into Stack.

3. Select one or more of those panorama stacks and do Photo > Photo Merge > HDR Panorama.
(Edited)
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Antoine Hlmn

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Gotcha!

It’s a balanced choice between understanding a HDR Panorama is made of different HDR stacks OR keeping the option to batch process HDR Panoramas altogether...

But I’d assume LR would be smart enough to understand whether or not it’s a HDR based on exposure levels (and content).
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Carlos Cardona

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Here's what I think would be the best way to deal with stack selections:Keep the "clicking on a stack selects only the top image", but then add an entry into the contextual menu to say "Select entire stack". What's so hard about that?
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Arjun Haarith, Employee

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Hi Antoinne,

The behaviour you are experiencing is as designed. Lightroom works on each stack seperately, and performs whatever merge operation you have selected on all the stacks.

So in your case, you have 3 stacks (different exposure bracket). So when you select either HDR/Pano/HDR-Pano, it detects if there are candidate images in each of the stack for the selected operation, and then performs the merging appropriately.

If at all you wanted to perform HDR-Pano for those 9 images (3 images in 3 stacks), you will have to group them into a single stack instead of 3 different stacks.

I hope this resolves your query.

Thanks,
Arjun
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Antoine Hlmn

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Indeed, now I get it. But to me it's not the most straightforward way of working:
HDR = One stack
Pano = One stack
HDR Pano = Stack of stacks which equals to multiple stacks.

But this would indeed mean to give away the option to batch process HDR Panoramas or would require an other implementation of the queing principle for stacking.
(Edited)
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John R. Ellis, Champion

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Actually, it's:

HDR = One stack
Panorama = One stack
HDR Panorama = One stack

So you can batch process HDR Panoramas just like HDRs and Panoramas.

In the modified workflow I suggested above, I suggested making the HDR Panorama stack in two steps: first auto-stack all the photos based on capture time (the exposure brackets); then stack all of the bracket stacks for a single panorama.  When you select multiple stacks and do Group Into Stack, it merges the stacks into one stack rather than making a stack of stacks (LR doesn't have the concept of stack of stacks).

Doing the stacking in two steps might make it easier to stack multiple panoramas (e.g. if you have 10 panoramas, each with 6 camera positions of 3 brackets each).   But you can certainly make each HDR panorama stack in one step (e.g. select all 18 photos for an HDR panorama and do Group Into Stack).


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Antoine Hlmn

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I know, I know ;)
But in my mind, stacks are used to stack images with one common feature, such as in a pano or in a HDR, not two common feature. I say this because stacks has only 1 "top" image representative for it's content.

I understant the logic behind storing everything in one single stack, but I find it less obvious and would think LR could be able to detect HDR Panos using exposure... but that's only my feeling.